Restate the following income statement for a retailer in contribution format.

Sales revenue ($100 per unit)				$	98,000
Less cost of goods sold ($58 per unit)					56,840
Gross margin					41,160
Less operating costs:
Commissions expense ($5 per unit)	$	4,900
Salaries expense		7,900
Advertising expense		5,800
Shipping expense ($3 per unit)		2,940			21,540
Operating income				$	19,620